#!/usr/bin/python
# coding:utf-8
# auther:DT
# 2017-08-08_16-15-10


def add(a = 5, b = 2, c = 0):
    return a+b+c

print(add(1,3,65))
print(add(65))
print(add(1,5))
print(add(3,65))
print(add(5))


print("=========================")


def add1(d, e, f):
    return d+e+f

print(add1(10,20,30))
